This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why are metamorphic rocks difficult to date accurately? What will be an ideal ... (Read 35 times)

jessicacav

  • Hero Member
  • *****
  • Posts: 558
on: Jul 15, 2018
Why are metamorphic rocks difficult to date accurately? What will be an ideal response?

Question 2

What is a closed system, and why is it necessary for a rock or mineral being dated to be a closed
  system? What is the result if it is not a closed system? What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

cpetit11

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 15, 2018
Answer to Question 1

Heat and pressure may cause the parent or daughter isotope to leak from the mineral being analyzed. If
the daughter is completely lost from the system, the date calculated would be the time since
metamorphism. The decay rate of the parent will not change though.



Answer to Question 2

A closed system means that neither parent nor daughter atoms have been added or removed from the
system since crystallization and that the ratio between them is the result only of radioactive decay. If
the daughter atoms have leaked out of the mineral being analyzed, the calculated age will be too
young; if parent atoms have been removed, the age will be too old.



jessicacav

  • Member
  • Posts: 558
Reply 2 on: Jul 15, 2018
Gracias!

Animal_Goddess

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his Earth’s history spans 4.5 billion years. Geologists and paleontologists have pieced together the his
Rocks are the most common geosphere materials, and can be fun, dangerous, beauti Rocks are the most common geosphere materials, and can be fun, dangerous, beauti
Metamorphic Rocks Metamorphic Rocks
Icant keep calm, today is my due date Icant keep calm, today is my due date
Detrital Sedimentary Rocks Detrital Sedimentary Rocks
Determining the Ages of Rocks Using Fossils Determining the Ages of Rocks Using Fossils
Video: Non-polar compounds - insolubility

For a complete list of videos, visit our video library